盐诱导的依赖叶黄素循环的热耗散提高了小麦的耐盐性  

Salt-Induced Xanthophyll Cycle-Dependent Thermal Dissipation Improved Salt Tolerance of Wheat(Triticum aestivum L.)

作　　者：王倩[1] 高雪[1] 彭建云[1] 王宝山[1] 

机构地区：[1]山东师范大学生命科学学院逆境植物重点实验室,济南250014

出　　处：《植物生理学通讯》2010年第10期1020-1024,共5页Plant Physiology Communications

基　　金：国家自然科学基金(30870138);国家海洋"863"重点项目(2007AA091701)

摘　　要：以小麦抗盐品种‘DK961’和盐敏感品种‘LM15’为材料,探讨盐胁迫条件下叶黄素循环与膜脂过氧化的关系。结果表明:200mmol·L-1NaCl处理后二者地上部分鲜重、含水量、K+含量显著下降,Na+含量、Na+/K+比、丙二醛含量显著升高,膜透性显著增大,‘LM15’的变化幅度均明显大于‘DK961’,而‘LM15’脱环氧化状态(A+Z)/(A+Z+V)的增加明显小于‘DK961’。这表明盐胁迫下‘DK961’通过增加依赖叶黄素循环的热耗散减轻了膜脂过氧化,提高其耐盐性。In this paper,the relationship between lipid peroxidation and xanthophyll cycle was examined using salt-tolerant wheat（Triticum aestivum） variety ＇Dekang 961＇（＇DK961＇） and salt-sensitive variety ＇Lumai 15＇（＇LM15＇） under short-term NaCl stress.The results showed that the shoot fresh weight,water content and K＋ content all significantly decreased in both cultivars treated with 200 mmol·L-1 NaCl for 3 d,while Na＋ content,Na＋/K＋ ratio,malondialdehyde（MDA） content as well as membrane permeability significantly increased.The changing degree in ＇LM15＇ was much higher than that in ＇DK961＇.However,deoxy cyclic state（A＋Z）/（A＋Z＋V） increased more in ＇DK961＇ than in ＇LM15＇.These results suggested that ＇DK961＇ is more salt-tolerant than ＇LM15＇ partly via increasing a xanthophyll cycle-dependent thermal dissipation to maintain a low level of lipid peroxidation.

关 键 词：小麦 盐胁迫 膜脂过氧化 叶黄素循环 耐盐性 

分 类 号：S512.1[农业科学—作物学] Q945.78[生物学—植物学]